中段内落とし受け
Chūdan uchi otoshi uke
Mid-level center dropping block

Also known as otoshi ude uke 落とし腕受け (dropping forearm block).

 

Shimabukuro Zenshin
Shōrin ryū Seibukan

Zenpo Shimabukuro and Dan Smith, Shorin Ryu Seibukan: Kyan’s Karate

Nikko Dojo

 

Blocking surface is naiwan 内腕 (inside of forearm)

Okazaki Teruyuki 岡崎照幸
Shōtōkan

Okazaki Teruyuki and Milorad V Stricevic, The Textbook of Modern Karate

 

Morote chūdan otoshi ude uke 諸手中段落とし腕受け (double middle level dropping block)